Bogen ASM1 Self-Powered Easy-Install Ceiling Paging SpeakerThe Bogen ASM1 Easy Install Self Amplified Speaker is a surface mount speaker, designed to typically install in less than a minute. Installation is a simple, three step process that does not require tools. First, four specially designed studs pierce the ceiling tile. Second, two custom designed wing nuts secure the speaker to the ceiling. Third, standard wire nuts make the 24V DC power and audio connections directly to the color coded studs. The ASM1